diff options
Diffstat (limited to 'drivers/gpu/drm/tegra/bus.c')
-rw-r--r-- | drivers/gpu/drm/tegra/bus.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/bus.c b/drivers/gpu/drm/tegra/bus.c new file mode 100644 index 0000000..565f8f7 --- /dev/null +++ b/drivers/gpu/drm/tegra/bus.c @@ -0,0 +1,76 @@ +/* + * Copyright (C) 2013 NVIDIA Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "drm.h" + +static int drm_host1x_set_busid(struct drm_device *dev, + struct drm_master *master) +{ + const char *device = dev_name(dev->dev); + const char *driver = dev->driver->name; + const char *bus = dev->dev->bus->name; + int length; + + master->unique_len = strlen(bus) + 1 + strlen(device); + master->unique_size = master->unique_len; + + master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL); + if (!master->unique) + return -ENOMEM; + + snprintf(master->unique, master->unique_len + 1, "%s:%s", bus, device); + + length = strlen(driver) + 1 + master->unique_len; + + dev->devname = kmalloc(length + 1, GFP_KERNEL); + if (!dev->devname) + return -ENOMEM; + + snprintf(dev->devname, length + 1, "%s@%s", driver, master->unique); + + return 0; +} + +static struct drm_bus drm_host1x_bus = { + .bus_type = DRIVER_BUS_HOST1X, + .set_busid = drm_host1x_set_busid, +}; + +int drm_host1x_init(struct drm_driver *driver, struct host1x_device *device) +{ + struct drm_device *drm; + int ret; + + INIT_LIST_HEAD(&driver->device_list); + driver->bus = &drm_host1x_bus; + + drm = drm_dev_alloc(driver, &device->dev); + if (!drm) + return -ENOMEM; + + ret = drm_dev_register(drm, 0); + if (ret) + goto err_free; + + DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name, + driver->major, driver->minor, driver->patchlevel, + driver->date, drm->primary->index); + + return 0; + +err_free: + drm_dev_free(drm); + return ret; +} + +void drm_host1x_exit(struct drm_driver *driver, struct host1x_device *device) +{ + struct tegra_drm *tegra = dev_get_drvdata(&device->dev); + + drm_put_dev(tegra->drm); +} |